ELEMENTAL ANALYSIS AND RADIOACTIVITY EVALUATION OF AEROSOLS GENERATED DURING HEATING OF SIMULATED FUEL DEBRIS IN THE URASOL PROJECT

Youichi Tsubota; Laffolley Hugo; Emmanuel Porcheron; Christophe Journeau; Jules Delacroix; Célia Guévar; Emmanuelle Brackx; Yvan Lallot; Antonin Bouland

doi:10.1299/jsmefdr.2024.0_1033

2024

Session ID : 1033

DOI https://doi.org/10.1299/jsmefdr.2024.0_1033

Conference information

Host: The Japan Society of Mechanical Engineers

Name : Proceedings of FDR2024 International Topical Workshop on Fukushima Decommissioning Research

Date : October 10, 2024 - October 13, 2024

ELEMENTAL ANALYSIS AND RADIOACTIVITY EVALUATION OF AEROSOLS GENERATED DURING HEATING OF SIMULATED FUEL DEBRIS IN THE URASOL PROJECT

Youichi Tsubota, Laffolley Hugo, Emmanuel Porcheron, Christophe Journeau, Jules Delacroix, Célia Guévar, Emmanuelle Brackx, Yvan Lallot, Antonin Bouland

Author information

Youichi Tsubota
Japan Atomic Energy Agency, CLADS, as a member of International Research Institute for Nuclear Decommissioning (IRID)
Laffolley Hugo
Japan Atomic Energy Agency, CLADS, as a member of International Research Institute for Nuclear Decommissioning (IRID)
Emmanuel Porcheron
Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN-RES, SCA
Christophe Journeau
CEA, DES, IRESNE, DTN, SMTA
Jules Delacroix
CEA, DES, IRESNE, DTN, SMTA
Célia Guévar
CEA, DES, ISEC, DMRC, Univ Montpellier
Emmanuelle Brackx
CEA, DES, ISEC, DMRC, Univ Montpellier
Yvan Lallot
ONET Technologies
Antonin Bouland
ONET Technologies

Keywords: Fukushima Daiichi, decommissioning, aerosol, simulated fuel debris, radioactivity

CONFERENCE PROCEEDINGS RESTRICTED ACCESS

Details

Abstract

In order to safely remove fuel debris from the Fukushima Daiichi Nuclear Power Station (1F), it is necessary to quantitatively evaluate the radioactive airborne particulate generated by the cutting of nuclear fuel debris. We fabricated Uranium-bearing simulated fuel debris (SFD) with In/Ex-Vessel compositions and evaluated the physical and chemical properties of aerosols generated by heating the SFDs. Based on these results, we estimated the isotopic composition and radioactivity of aerosols produced when 1F-Unit2 fuel debris are heated (or laser cut). Plutonium, mainly ²³⁸Pu, ²³⁹Pu, ²⁴¹Am, and ²⁴⁴Cm were found to be the alpha nuclide, and ²⁴¹Pu, ¹³⁷Cs-Ba, and ⁹⁰Sr-Y were found to be the beta nuclide of interest.

Corresponding author

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